Roof construction



June 4, 1940. W N ON 2,203,312

ROOF CONSTR UCTION Filed July 25, 1938 INVENTOR fiery: E SWE'NSON.

BY dhh ATTORNEY Patented June 4, 1940 ROOF CONSTRUCTION George E.Swenson, Hastings on Hudson, N. Y., asslgnor to The Celotex Corporation,Chicago, 11]., a corporation of Delaware Application July 25, 1938,Serial No. 221,055

2 Claims. v (431. 108-26) This invention relates to a new and noveldetail of roof construction and refers particularly to the provision ofa new and improved cantstrip assemblage which may be quite advan- 6tageous'ly incorporated. in roof construction.

It is particularly an object of this invention to provide a new andimproved cant-strip construction which cant-strip will be of low cost,willbe one which is easily applied and one which may m be supplied in afinished form ready for use by the roofer in connection with theapplication of roofs. Other objects and advantages of the inventionhereof will be apparent to one skilled in the art on reading theaccompanying specifi- 15 cation.

In the drawing:

Figure l is an elevation of a portion of a building structure showing incross-section the application therein of the inventions hereof; and

20 Figure 2 is a perspective view on an enlarged scale illustrating thecant-strip assemblage comprising the invention.

In the drawing there is illustrated at In a parapet wall or the like andat ii any suitable 25 roof deck structure which elements are thoseusually embodied in various building structures.

There is indicated at l2 a roofing which is laid over roof deck II whichroofing 12 while shown only as a single sheet of roofing may, of course30 be any of the usual roofings such as a built-up sheet felt andasphalt roof or the like. In the drawing it will be seen that in theangle where the roof deck It meets the parapet wall l there has beenapplied a cant-strip assemblage Ill 35 which is inclinedwith respect toeach the parapet wall Ill and the roof deck H so that this unit H ineffect fills in the corner formed at the juncture of parapet wall l0 androof deck It so that the right angle which is formed at such 40 juncturedoes not exist so far as the application of roofing I2 is concerned.

The cant-strip assemblage l1 comprises two parts, one, a board formstrip 13 and a. felt strip r l4 which strip l3 and felt M are suitablysecured 40 together as by an adhesive or by suitable stapling, or thelike or if desired, by a combination of an adhesive and stapling or thelike. The side edges of the strip l3 as may readily be seen in thedrawing are reversely beveled so thatthe assemblage II when placed inthe'corner. between the parapet wall It) and roof deck Il may be appliedtherein in an inclined position, which, as illustrated is at 45 degreesinclination and that 55 when so positioned the bevels 'on the edges ofstrip l3 fit against the face of the parapet,wall

l0 and against the surface of roof deck Ii.

The strip [3 for the purposes hereof will pref-7 erably be a strip ofsaturated fiber insulated board which is a felted fiber productmanufactured generally according to the processes of paper makinginvolving the felting of the fiber from a fluid suspension thereof. Thefelted and dry sheet of fiber board is subsequently preferably saturatedto the extent of about 150 to 10 200% of its weight with a suitable,saturant of a bituminous or asphaltic substance or pitch or othergenerally like saturant. The strip I?! may be saturated with anasphaltic material of between about 110 degrees to 140 degrees F. melt,l5 ing point or if saturated with saturant other than asphalt, the suchsaturant may be any suitable water-proof saturant havingphysicalproperties generally similar to those of the asphaltic materialjust particularly referred to. Saturation of the strip i3 as describedaffords additional body to the strip, stiffens it up, makes itwater-proof and affords other desirable characteristics as will bereadily understood. Felt sheet IQ which is secured to the strip l3 maybe a strip of ordinary saturated and/or coated fiber roofing sheet or itmay be some other suitable felted and fabric strip which preferably hasbeen suitably water-proofed as by impregnation with asphalt or likewater-proofing'substances.

In the application of this invention in the construction of roofingstructures, the cant-strip assemblage l'i will be installed in the angleformed between the parapet wall It and roof deck H in the position as isparticularly shown in Figure 1 of the drawing and in applying thecantstrip I? as stated the outwardly extending portion of the felt sheeti which is shown as lying against the face of parapet wall ill will besuitably secured to the face of such will which may 40 beaccomplished'either bynailing through the strip into the mortar jointsor by the use of a suitable asphaltic or other adhesive applied to thewall surfaces or to the strip M or both as may be desired. The otherextending portion of the felt strip lfl may also be suitably secured tothe roof deck H as will be readily apparent and this strip may be sosecured either by nailing or by means of an adhesive.

After the cant-strip assemblage H has been suitably secured in the anglebetween the parapet wall It] and roof deck I l the subsequent steps inthe application of the roofing may proceed and as the roofing sheet I!is laid it will be at its edge extended over that portion of the feltsheet H 5 which is secured to the upper surfaces of roof deck H and onupover the face of the cant-strip l3 to any suitable extent preferablyextending 'clear across the face of cant-strip l3.

After the roofing sheet I! has been carried up over the face of thecant-strip l3'as described then any suitable flashing may be applied tocomplete the roofing application. As illustrated, a flashing l5 at itsupper end suitably secured to or in the parapet wall I I, as forexample, as by.

suitable application in the mortar joint I6, will be carried down alongthe face of the parapet wall I II, on down over the portion of theroofing l2 which extends up across the face of cant-strip l3 and then ondown onto the upper surface of 7 the roofing sheet l2 where the flashingwill be secured by the use of suitable asphaltic or other water-proofadhesive.

It'will be readily seen that the detail of a roof construction, as hasbeen above described in detail, will provide a manner of finishing offwhat would be otherwise a right angle corner, at the juncture of roofdeck II with the face of the parapet wall In and that there is provideda con struction which, is not readily susceptible to' damage and inwhich due to the fact that the roofing sheet is not carried up into thesuch right angle corner, the sharp bend which under such circumstanceswould of necessity have occurred in roofing sheet ii in such cornerpisnot present so that the dimculties which ordinarily arise where suchsharp bend is present in the roofing sheet-will be avoided.

It will be readily seen that by the use of the rant-strip assemblagewhich has been herein particularly described, that there is provided animproved roofing construction wherein various difliculties formerlycommon in roof constructions are avoided and it will further be seenthat the particular cant-strip assemblage which has been described isone which in addition to satisfactorily serving its desired functions isyet one of very low cost although easily installed with but littlelabor.

The inventions hereof havlng been described in detail, I claim:

1. A combination strip of materials secured one to the other andconstituting a cant-strip for a roofing construction, the one materialbeing a felted 'fiber board impregnated with a waterproofing and alongits opposite edges reversely bevelled from one face toward the otherface.

thereof, the other material being of flexible sheet form saturated witha water-proofing, the flexible Q material of greater width than theboard form material and secured against the narrower face of the boardform strip providing flexible flanges along the edges of the combinationcant-strip, such flanges constituting means for securing the cant-stripin roofing construction.

' 2. In a roofing construction, a roof deck and a I marginal walltherefor, a cant-strip positioned in the angle between the roof deck andmarginal wall, the cant-strip extending diagonally therebetweenandcomprising an elongated stifi board form strip-having its opposite edgesrever'sely bevelled from one face toward the other face thereof; 'a thinelongated strip of flexible sheet form material of greater widththanpthe board form materialseoured against the narrower face ofv theboard form strip providing flexible flanges along the edges of theelongated stiff board form strip, the elongated s'tifl board form stripposi-

